Russ, I normally bought mine at a Carrier supply house in Fort Worth when I lived in that area. I like the paste over the liquid but I do have a bottle of liquid left and the address on it is Gem products, inc., Garden Grove, Ca 92641. I bought the liquid from Johnstone Supply Co. http://www.e-johnstonesupply.com. The stock number is B 80 992. They only show the liquid but you might ask them about the paste form. If you happen to live in FW, let me know and I'll tell you where to go to get it. Good luck.